Philip Tetlock

Leonore Annenberg University Professor of Psychology, University of Pennsylvania; author, Expert Political Judgment: How Good Is It? How Can We Know?

PHILIP E. TETLOCK is Leonore Annenberg University Professor of Psychology at the University of Pennsylvania.

He has written several non-fiction books on politics, including Counterfactual Thought Experiments in World Politics (with Aaron Belkin; 1996) and Expert Political Judgment: How Good Is It? How Can We Know?.

His Expert Political Judgment: How Good Is It? How Can We Know? (2005) describes a twenty-year study in which 284 experts in many fields, including government officials, professors, journalists, and other, and with many opinions, from Marxists to free-marketeers, were asked to make 28,000 predictions about the future, finding that they were only slightly more accurate than chance, and worse than basic computer algorithms which was the recipient of the 2008 University of Louisville Grawemeyer Award for Ideas Improving World Order.